Hi, by default the Thunderbird email windows has the "To:" field and you can add emails in the "CC:" and "BCC:" lines. Is there a way to completely cancel the "CC:" line, so that I have no chance of ever sending a mail via "CC:" again. I only want to have the "To:" and the "BCC:" fields as options but no "CC:" field. I just sent a mail with a lot of addressses in "CC" instead of "BCC" which a huge catastrophy because everybody can now see highly confidential email addresses.